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Q. |
An object of mass 0.2kg executes simple harmonic motion along the x-axis with a frequency of (25/π)Hz. At the position x = 0.04, the object has kinetic energy of 0.5J and potential energy 0.4J. The amplitude of oscillation is? |
A. | 6cm |
B. | 4cm |
C. | 8cm |
D. | 2cm |
Answer» A. 6cm | |
Explanation: total energy, e=2π2 mv2 a2 0.5+0.4=2π2×0.2×(25/π)2 a2 a2=0.9/(0.4×252) a=3/(2×25)=3/50 m=6cm. |
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